Index: src/libchcore/ErrorCodes.h
===================================================================
diff -u -N -rbaad6054459abaaf69cbfd1ebad8783085160d99 -rc1f7af79a52133c6d4b14944c3370288be7f5af5
--- src/libchcore/ErrorCodes.h	(.../ErrorCodes.h)	(revision baad6054459abaaf69cbfd1ebad8783085160d99)
+++ src/libchcore/ErrorCodes.h	(.../ErrorCodes.h)	(revision c1f7af79a52133c6d4b14944c3370288be7f5af5)
@@ -51,6 +51,7 @@
 		eErr_CannotSuspendThread = 1008,
 		eErr_CannotSetEvent = 1009,
 		eErr_CannotCreateMutex = 1010,
+		eErr_MutexAlreadyLocked = 1011,
 
 		// string errors (1500+)